The .trash folder in /home/$username/.trash contains any files that a user has deleted via their cpanel’s file manager. If your users are not clearing this out, it can start to eat up a lot of disk space on your server.
If you want to empty every users .trash folder, simply run this command.
find /home/*/.trash/* -exec rm -rf {} \;
If you also have a home2, home3, etc etc, you can use this command.
find /home*/*/.trash/* -exec rm -rf {} \;
